Conduit box



R. P. DUNMIRE CONDUIT BOX Filed Dec. 19, 1925 Patented Nov. 1, 1927.

UNITED OFFICE.

RUSSELL P. DUNMIRE, OF ERIE, PENNSYLVANIA," ASSIGNOR TO ERIE MALLEABLEIRON COMPANY, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

. ooim'ur'r BOX.

Application filed December 19, 1925. Serial No. 76,486.

Fig. 2 a sectlon on the line 22 in Fig.1.

Fig. 3 a perspective view of the locking shoulder bending tool.

Fig. 4 a detached vlew of the operating' cam on the bending tool.

1 marks the body of the box, 2 a conduitreceiving extension, theextenslon having a tapered opening 3. A contractible sleeve 4' operatesagainst the walls 3. It has an axial slit 5 and a guard shoulder 6. Itis provided with the enamel penetrating ribs 7 adapted to engage aninserted conduit 8'.

Tongues 9 are cast on the walls of the box which is ordinarily amalleable cast-ing. The tongues initially are of such shape as to permitthe insertion of the sleeve 1 into the conduit receiving opening. Theconduit is inserted in the sleeve and the tongues 9 are bent forward andwith the same operation the sleeve is forced into clamping engagementwith the conduit.

Convenient means for accomplishing the bending of the tongue is providedby the shoulderv bending tool. This is formed with a block 10 having acentral slot 11 in which is aranged an eccentric-12. A handle 13 extendsfrom the eccentric. The eccentric operates on a bolt 14, the cross head15 eX- tending from the bolt into position to engage the tongues 9. Theopposite end of the block has projections 16 which are adapted to engagethe base of the opposing tongues. By swinging the'eccentric, the bolt 14is forced outwardly forcing the tongues into engagement with the rear ofthe sleeve forcing the sleeve into clamping engagement .1 with theconduit and at the same time seat-. ing the tongues in place against thesleeve as shown at the left of Fig. 1.

Thus the entire assembling of the device is accomplished with a singlemovementof the tonguebending tool.

this is engaged by a flange Ben the extension.

l/Vhat I claim as new is Q 1. In a conduit box, the combination of abody having a conduit-receiving opening and an inwardly projectingbendable tongue extending from the body back of the opening, and aslitted contractiblesleeve in the opening, the walls of said opening andsleeve having wedging surfaces contracting the sleeve with an endwisemovement of the sleeve in the opening, and said tongue having an initialposition permitting the inser tion of the sleeve and in the opening andbeing bendable to permit of the forcing of the tongue into lockingengagement with the sleeve in place in the opening.

2. In a conduit box, the combination of a body having aconduit-receivingopening and inwardly projecting bendable tongues extending from oppositesides of the body back of the opening; and a slitted contractiblesleeve'in the opening,'the walls of said opening and the sleeve havingwedging surfaces contracting the sleeveiwith an end- Wise movement ofthe'sleeve in the opening, and said tongues having an initial positionpermitting the insertion of tlie'sleeve in the opening and beingbendable to permit of the forcing of the tongues into locking engagementwith the sleeve in place in the opening.

In testimony whereof I have hereunto set my hand.

RUSSELL fP. DUNMIRE.

If desired, a gasket 17lmay be arranged at the front of the sleeve 4 and

